Adds --require switch to allow user specific config

This will allow people to configure bundler, sass plugins, special
configurations, etc.

refs: zmoazeni#54

Author: zmoazeni

CHANGELOG.md

@@ -1,3 +1,7 @@
+## (Unreleased) ##
+
+* Adds --require switch for user configuration
+
 ## 1.2.0 - 4/14/2013 ##
 
 * 0 and 0px are now reconciled as redundancies

lib/csscss/cli.rb

@@ -101,6 +101,10 @@ def parse(argv)
           enable_compass(config)
         end
 
+        opts.on("--require file.rb", "Load ruby file before running csscss.", "Great for bootstrapping requires/configurations") do |file|
+          load file
+        end
+
         opts.on("--[no-]match-shorthand", "Expands shorthand rules and matches on explicit rules (default is true)") do |match_shorthand|
           @match_shorthand = match_shorthand
         end